221 lines
6.1 KiB
C
221 lines
6.1 KiB
C
/*****************************************************************************/
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/* srp.h -- SCSI RDMA Protocol definitions */
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/* */
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/* Written By: Colin Devilbis, IBM Corporation */
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/* */
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/* Copyright (C) 2003 IBM Corporation */
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/* */
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/* This program is free software; you can redistribute it and/or modify */
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/* it under the terms of the GNU General Public License as published by */
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/* the Free Software Foundation; either version 2 of the License, or */
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/* (at your option) any later version. */
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/* */
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/* This program is distributed in the hope that it will be useful, */
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/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
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/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
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/* GNU General Public License for more details. */
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/* */
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/* This file contains structures and definitions for IBM RPA (RS/6000 */
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/* platform architecture) implementation of the SRP (SCSI RDMA Protocol) */
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/* standard. SRP is used on IBM iSeries and pSeries platforms to send SCSI */
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/* commands between logical partitions. */
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/* */
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/* SRP Information Units (IUs) are sent on a "Command/Response Queue" (CRQ) */
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/* between partitions. The definitions in this file are architected, */
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/* and cannot be changed without breaking compatibility with other versions */
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/* of Linux and other operating systems (AIX, OS/400) that talk this protocol*/
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/* between logical partitions */
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/*****************************************************************************/
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#ifndef VIOSRP_H
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#define VIOSRP_H
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#include <scsi/srp.h>
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#define SRP_VERSION "16.a"
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#define SRP_MAX_IU_LEN 256
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#define SRP_MAX_LOC_LEN 32
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union srp_iu {
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struct srp_login_req login_req;
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struct srp_login_rsp login_rsp;
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struct srp_login_rej login_rej;
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struct srp_i_logout i_logout;
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struct srp_t_logout t_logout;
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struct srp_tsk_mgmt tsk_mgmt;
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struct srp_cmd cmd;
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struct srp_rsp rsp;
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u8 reserved[SRP_MAX_IU_LEN];
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};
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enum viosrp_crq_headers {
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VIOSRP_CRQ_FREE = 0x00,
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VIOSRP_CRQ_CMD_RSP = 0x80,
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VIOSRP_CRQ_INIT_RSP = 0xC0,
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VIOSRP_CRQ_XPORT_EVENT = 0xFF
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};
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enum viosrp_crq_init_formats {
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VIOSRP_CRQ_INIT = 0x01,
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VIOSRP_CRQ_INIT_COMPLETE = 0x02
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};
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enum viosrp_crq_formats {
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VIOSRP_SRP_FORMAT = 0x01,
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VIOSRP_MAD_FORMAT = 0x02,
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VIOSRP_OS400_FORMAT = 0x03,
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VIOSRP_AIX_FORMAT = 0x04,
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VIOSRP_LINUX_FORMAT = 0x05,
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VIOSRP_INLINE_FORMAT = 0x06
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};
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enum viosrp_crq_status {
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VIOSRP_OK = 0x0,
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VIOSRP_NONRECOVERABLE_ERR = 0x1,
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VIOSRP_VIOLATES_MAX_XFER = 0x2,
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VIOSRP_PARTNER_PANIC = 0x3,
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VIOSRP_DEVICE_BUSY = 0x8,
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VIOSRP_ADAPTER_FAIL = 0x10,
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VIOSRP_OK2 = 0x99,
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};
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struct viosrp_crq {
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u8 valid; /* used by RPA */
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u8 format; /* SCSI vs out-of-band */
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u8 reserved;
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u8 status; /* non-scsi failure? (e.g. DMA failure) */
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__be16 timeout; /* in seconds */
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__be16 IU_length; /* in bytes */
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__be64 IU_data_ptr; /* the TCE for transferring data */
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};
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/* MADs are Management requests above and beyond the IUs defined in the SRP
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* standard.
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*/
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enum viosrp_mad_types {
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VIOSRP_EMPTY_IU_TYPE = 0x01,
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VIOSRP_ERROR_LOG_TYPE = 0x02,
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VIOSRP_ADAPTER_INFO_TYPE = 0x03,
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VIOSRP_CAPABILITIES_TYPE = 0x05,
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VIOSRP_ENABLE_FAST_FAIL = 0x08,
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};
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enum viosrp_mad_status {
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VIOSRP_MAD_SUCCESS = 0x00,
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VIOSRP_MAD_NOT_SUPPORTED = 0xF1,
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VIOSRP_MAD_FAILED = 0xF7,
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};
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enum viosrp_capability_type {
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MIGRATION_CAPABILITIES = 0x01,
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RESERVATION_CAPABILITIES = 0x02,
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};
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enum viosrp_capability_support {
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SERVER_DOES_NOT_SUPPORTS_CAP = 0x0,
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SERVER_SUPPORTS_CAP = 0x01,
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SERVER_CAP_DATA = 0x02,
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};
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enum viosrp_reserve_type {
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CLIENT_RESERVE_SCSI_2 = 0x01,
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};
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enum viosrp_capability_flag {
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CLIENT_MIGRATED = 0x01,
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CLIENT_RECONNECT = 0x02,
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CAP_LIST_SUPPORTED = 0x04,
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CAP_LIST_DATA = 0x08,
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};
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/*
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* Common MAD header
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*/
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struct mad_common {
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__be32 type;
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__be16 status;
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__be16 length;
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__be64 tag;
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};
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/*
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* All SRP (and MAD) requests normally flow from the
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* client to the server. There is no way for the server to send
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* an asynchronous message back to the client. The Empty IU is used
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* to hang out a meaningless request to the server so that it can respond
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* asynchrouously with something like a SCSI AER
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*/
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struct viosrp_empty_iu {
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struct mad_common common;
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__be64 buffer;
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__be32 port;
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};
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struct viosrp_error_log {
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struct mad_common common;
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__be64 buffer;
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};
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struct viosrp_adapter_info {
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struct mad_common common;
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__be64 buffer;
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};
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struct viosrp_fast_fail {
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struct mad_common common;
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};
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struct viosrp_capabilities {
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struct mad_common common;
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__be64 buffer;
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};
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struct mad_capability_common {
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__be32 cap_type;
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__be16 length;
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__be16 server_support;
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};
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struct mad_reserve_cap {
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struct mad_capability_common common;
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__be32 type;
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};
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struct mad_migration_cap {
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struct mad_capability_common common;
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__be32 ecl;
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};
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struct capabilities {
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__be32 flags;
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char name[SRP_MAX_LOC_LEN];
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char loc[SRP_MAX_LOC_LEN];
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struct mad_migration_cap migration;
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struct mad_reserve_cap reserve;
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};
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union mad_iu {
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struct viosrp_empty_iu empty_iu;
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struct viosrp_error_log error_log;
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struct viosrp_adapter_info adapter_info;
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struct viosrp_fast_fail fast_fail;
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struct viosrp_capabilities capabilities;
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};
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union viosrp_iu {
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union srp_iu srp;
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union mad_iu mad;
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};
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struct mad_adapter_info_data {
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char srp_version[8];
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char partition_name[96];
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__be32 partition_number;
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#define SRP_MAD_VERSION_1 1
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__be32 mad_version;
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#define SRP_MAD_OS_LINUX 2
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#define SRP_MAD_OS_AIX 3
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__be32 os_type;
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__be32 port_max_txu[8]; /* per-port maximum transfer */
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};
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#endif
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